[all-commits] [llvm/llvm-project] d0b0db: [msan] Intercept dladdr1, and refactor dladdr

[Thurston Dang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d0b0dbeae17756f7ba99e0867cfb867fcb375066
      https://github.com/llvm/llvm-project/commit/d0b0dbeae17756f7ba99e0867cfb867fcb375066
  Author: Thurston Dang <thurston at google.com>
  Date:   2023-07-01 (Sat, 01 Jul 2023)

  Changed paths:
    M compiler-rt/lib/msan/CMakeLists.txt
    A compiler-rt/lib/msan/msan_dl.cpp
    A compiler-rt/lib/msan/msan_dl.h
    M compiler-rt/lib/msan/msan_interceptors.cpp
    A compiler-rt/test/msan/dladdr1_test.c

  Log Message:
  -----------
  [msan] Intercept dladdr1, and refactor dladdr

This patch adds an msan interceptor for dladdr1 (with support
for RTLD_DL_LINKMAP and RTLD_DL_SYMENT) and an accompanying
test. It also adds a helper file, msan_dl.cpp, that contains
UnpoisonDllAddrInfo (refactored out of the dladdr interceptor)
and UnpoisonDllAddr1ExtraInfo.

Differential Revision: https://reviews.llvm.org/D154272